issue_comments: 722082497

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https://github.com/simonw/sqlite-utils/issues/196#issuecomment-722082497 https://api.github.com/repos/simonw/sqlite-utils/issues/196 722082497 MDEyOklzc3VlQ29tbWVudDcyMjA4MjQ5Nw== 9599 2020-11-05T02:18:08Z 2020-11-05T02:18:08Z OWNER

I'm missing the case where a table has no quotes around it at all - create virtual table foo using fts5

So I need to know how to create a regex for a SQLite identifier. https://www.sqlite.org/draft/tokenreq.html seems to be the only available documentation for that.

Identifier tokens

Identifiers follow the usual rules with the exception that SQLite allows the dollar-sign symbol in the interior of an identifier. The dollar-sign is for compatibility with Microsoft SQL-Server and is not part of the SQL standard.

H41130: SQLite shall recognize as an ID token any sequence of characters that begins with an ALPHABETIC character and continue with zero or more ALPHANUMERIC characters and/or "$" (u0024) characters and which is not a keyword token.

Identifiers can be arbitrary character strings within square brackets. This feature is also for compatibility with Microsoft SQL-Server and not a part of the SQL standard.

H41140: SQLite shall recognize as an ID token any sequence of non-zero characters that begins with "[" (u005b) and continuing through the first "]" (u005d) character.

The standard way of quoting SQL identifiers is to use double-quotes.

H41150: SQLite shall recognize as an ID token any sequence of characters that begins with a double-quote (u0022), is followed by zero or more non-zero characters and/or pairs of double-quotes (u0022) and terminates with a double-quote (u0022) that is not part of a pair.

MySQL allows identifiers to be quoted using the grave accent character. SQLite supports this for interoperability.

H41160: SQLite shall recognize as an ID token any sequence of characters that begins with a grave accent (u0060), is followed by zero or more non-zero characters and/or pairs ofgrave accents (u0060) and terminates with a grave accent (u0022) that is not part of a pair.

 
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